Hi there. I am currently writing smart contracts for someone who wishes to conduct a crowdsale of ERC884 tokens. ERC884 is a standard devised for Delaware Amendment Compliance for keeping company stock ledgers on a blockchain. You can technically perform an STO by offering a crowdsale of ERC884 tok…

Hello @sharad-s , welcome to the forum! Your analysis is indeed correct (and interesting!). An exchange rate between tokens and ether can be expressed in two ways, such that you need to either multiply or divide by it (that is token = ether * rateMul or token = ether / rateDiv). It follows that rate…

Hi, I'm not sure if this is actually related, but I saw something familiar a few time ago. [image] Fixed Point Arithmetic support General We've received multiple requests for a fixed point math library in OpenZeppelin (e.g. here ). For those that are not familir with this…

Thank you @nventuro for your insight. I did end up overriding function _getTokenAmount to return weiAmount.div(_rate) and that works. However, currently the remainder up to 12_CENTS_IN_WEI is simply consumed by the contract. I reasoned that the truncation is not too much of an issue since you would…

[image] sharad-s: I reasoned that the truncation is not too much of an issue since you would never lose more than $0.12 in wei. Of course this is ethically grey but is a leap of assumption which makes the implementation clear and easy to use. I think this the right trade-off: when transferrin…

in the context of this token sale, the price will be a constant weiAmount ($0.12 set at instantiation). therefore no price fluctuations will occur. thank you very much your help here :slight_smile: I hope this thread will serve some benefit to others in the future

@sharad-s I'm curious, did you consider adding the following constraint that @nventuro suggested? I'm wondering if such a thing would be okay when the requirements are as strict as they seem to be in your case. [image] nventuro: An easier way would be to simply revert in _preValidatePurchase if…

@frangio I did end up changing the _getTokenAmount to use .div instead of .mul. I had preconceived notions against using the .div operation before @nventuro validated that it is possible, and the Crowdsale now works as expected with the Zero Decimal token. Also, I just let the Crowdsale consume t…

Tokenomics: Conducting a Crowdsale using a Zero Decimal ERC20 token

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obernardovieira April 1, 2019, 2:02pm 2

Hi,

I'm not sure if this is actually related, but I saw something familiar a few time ago.

Topic		Replies	Views
Fail with error 'SafeERC20: low-level call failed' (only with other decimals than 18) Contracts erc20	10	2071	April 19, 2021
Rate to use for Crowdsale for ERC20 token not using 18 decimals Contracts	4	2541	December 15, 2020
Handling rate (not whole number) in crowdsale Contracts crowdsale	6	1154	March 10, 2022
Fail with error 'Crowdsale: rate is 0' Smart Contracts erc20 , crowdsale	0	475	November 5, 2022
Help me write an erc20 token and a crowdsale contract Contracts erc20	9	7967	September 30, 2020

Tokenomics: Conducting a Crowdsale using a Zero Decimal ERC20 token

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